<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/js.vue.js"></script>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        body{
            background-color: #ccc;
        }
        .box{
            width: 500px;
            height: 400px;
            background-color: white;
        }
    </style>

</head>
<body>
    <div id="box">
    <ul>
        <!-- <li v-for="x in item">{{x.attca}}</li> -->
        <li v-for="(x,yc) in item">{{yc+10}}  {{x.attca}}</li>
    </ul> 
    <ul>
        <li v-for="x in 10">小小杨超</li>
    </ul>
</div>
    <script>
        Vue.createApp({
            data(){
                return{
                    item:[
                         {attca:"app"},
                         {attca:'ayy'}
                    ]
                }
            }
        }).mount('#box')
    </script>
</body>
</html>